Double coil



FIG. 1 is an isometric view of the front of a double coil, whichembodies my design;

FIG. 2 is a side view of the double coil;

FIG. 3 is a side view of the double coil;

FIG. 4 is a top plan view of the double coil;

FIG. 5 is a bottom plan view of the double coil;

FIG. 6 is a side view of the double coil; and,

FIG. 7 is a side view of the double coil.

The broken lines depict portions of the double coil that form no part ofthe claimed design.

CLAIM The ornamental design for a double coil, as shown and described.